Very recently a question and answer of mine was deleted [closed, Edit.] here:
The question and answer had been deleted by ACuriousMind alone (but this is not a diatribe against ACM).
I answered my own question in the spirit of this link:
It’s OK to Ask and Answer Your Own Questions
The FAQ has contained one key bit of advice from the very beginning: It’s also perfectly fine to ask and answer your own question, as long as you pretend you’re on Jeopardy! — phrase it in the form of a question. So … if you have a question that you already know the answer to…
I have applied "Q&A" that way before.
The standard, stated reason for the deletion was:
Homework-like questions and check-my-work questions are considered off-topic here, particularly when asking about specific computations instead of underlying physics concepts. Homework questions can be on-topic when they are useful to a broader audience. If you intend to modify your question, please read the links above carefully before editing. Note that answers with complete solutions may be deleted!
That definition has never sat with me very well because it's highly subjective. There are TONS of questions that make it through that filter, yet can EASILY be considered homework-like. Conversely, my question asked about a specific physics concept, concisely worded. And I provided a complete answer, because providing a partial one seemed silly here. Many of P.SE's posts make it into Google (and other SEs) where partial answers are of little value.
I believe deleting interesting, conceptual questions with correct, well-presented answers to be absurd - Kafkaesque even and contrary to the spirit of physics.stackexchange.